The Digital Data Connector (DDC) component provides a simplified approach to integrating and interacting with content external to IBM WebSphere Portal.
Already extensively used in rendering social-based content from IBM Connections, the DDC component can be used to integrate many other content sources. The guide attached walks you through how to present and interact with Salesforce Sales Cloud CRM content using a combination of IBM Cast Iron (as an integration layer) and IBM WebSphere Portal to consume, display and interact.

Hello! It is a bey interesting and useful article here, thank yo a lot! Will I be able to use the products from https://www.bpmonline.com/crm-products service for such an integration? I want to implement it soon for my business

Hi. If your application provides integration through RESTful services and feeds in XML / JSON formats you should be able to. You may or may not need to include IBM Cast Iron for data orchestration however I would suggest you investigate it further. Thank you for looking at the article.